Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "warrenbrayshaw"
<warrenbrayshaw@...> wrote:
>
> "pixelcanvas"  wrote:
> >
> 
> > The stuff I'm testing is this:
> > http://www.es.co.th/Detail_eng.asp?Prod=WARA%2DDRYFILM
> > 
> > I get it locally (I live in Bangkok), and unfortunately the
> > instructions are in Thai... my girlfriend helped me out with it but I
> > still think there may be something wrong with them... 
> > 
> 
> As this appears to be Wara product try the manufacturers web site to
> confirm your translation was correct.
> 
> http://www.warapcb.com/dryfilm.php
> 
> All the best

Yes, the translation is correct, but I have serious dubts about it's
usefulness. For example it does say to use a 100W light bulb for 15
minutes to expose the film, and I know for a fact that is way too
little time. So I think I should take those instructions with a pretty
large grain of salt...

Harvey, I think what you are saying about the bottom of the film not
being exposed may be correct.
I'm going to try to get an UV light, and expose a test board at
different times, I'll place a piece of cardboard over it and move it
to the side every 15 minutes or so to expose more of the board. Then
I'll see what exposure time works best.

Thanks  lot for the suggestions so far.
> Warren
>